JPH0578769A - Heat resistant alloy on intermetallic - Google Patents
Heat resistant alloy on intermetallicInfo
- Publication number
- JPH0578769A JPH0578769A JP3245429A JP24542991A JPH0578769A JP H0578769 A JPH0578769 A JP H0578769A JP 3245429 A JP3245429 A JP 3245429A JP 24542991 A JP24542991 A JP 24542991A JP H0578769 A JPH0578769 A JP H0578769A
- Authority
- JP
- Japan
- Prior art keywords
- atomic
- phase
- alloy
- resistant alloy
- heat resistant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は軽量かつ高比強度であ
り、優れた耐酸化性をもつ金属間化合物（Ｔｉ，Ｎｂ）
Ａｌ基耐熱合金に関し、特に山形過給機用ロータ材、エ
ンジンバルブ（自動車用）に有利に適用することができ
る同合金に関する。BACKGROUND OF THE INVENTION The present invention is an intermetallic compound (Ti, Nb) which is lightweight and has high specific strength and excellent oxidation resistance.
The present invention relates to an Al-based heat-resistant alloy, and particularly to the same alloy that can be advantageously applied to a rotor material for mountain turbochargers and engine valves (for automobiles).
【０００２】[0002]
【従来の技術】ＴｉとＡｌの２元系において、Ａｌが約
４８〜７０原子％にわたって結晶構造がＬ１0 である金
属間化合物ＴｉＡｌ（以下、ＴｉＡｌ相と云う）が存在
することは知られている。このＴｉＡｌ相は（１）軽
い、（２）比強度が大きいという特徴をもっている。BACKGROUND OF THE INVENTION 2-element of Ti and Al, Al of about 48 to 70 between the metal crystal structure is L1 0 over atomic% compound TiAl (hereinafter, referred to as TiAl phase) exists that is known to the There is. This TiAl phase is characterized by (1) being light and (2) having a high specific strength.
【０００３】しかし、このＴｉＡｌ相は常温延性に乏し
く、７００℃以上において強度及び耐酸化性が低下する
という問題点をもっている。However, this TiAl phase is poor in room temperature ductility and has a problem that strength and oxidation resistance are lowered at 700 ° C. or higher.
【０００４】近年、常温延性を改善したものとしてＶ添
加合金（米国特許第４２９４６１５号明細書参照）及び
Ｍｎ添加合金（特公昭６２−２１５号公報参照）が知ら
れているが、これらのいずれの合金も常温延性は改善さ
れたが、高温域における強度及び耐酸化性が不十分であ
るという欠点は解消されていないため、使用温度に制限
を受けている。In recent years, V-added alloys (see US Pat. No. 4,294,615) and Mn-added alloys (see Japanese Patent Publication No. 62-215) are known as those having improved room temperature ductility. The alloy also has improved room temperature ductility, but the drawbacks of insufficient strength and oxidation resistance in the high temperature region have not been solved, and therefore the operating temperature is limited.
【０００５】[0005]
【発明が解決しようとする課題】本発明は上記技術水準
に鑑み、ＴｉＡｌ相の常温延性、高温強度及び耐酸化性
を改善し、前記のＶ添加合金及びＭｎ添加合金より更に
高温用途に実用化し得る金属間化合物（Ｔｉ，Ｎｂ）Ａ
ｌ基耐熱合金を提供しようとするものである。In view of the above-mentioned state of the art, the present invention improves the room temperature ductility, high temperature strength and oxidation resistance of the TiAl phase and makes it practical for use at higher temperatures than the above V-added alloy and Mn-added alloy. Obtained intermetallic compound (Ti, Nb) A
It is intended to provide an l-base heat resistant alloy.
【０００６】[0006]
【課題を解決するための手段】本発明は金属間化合物
（Ｔｉ，Ｎｂ）Ａｌ相をベースとした合金であって、Ｔ
ｉを２５〜６０原子％、Ｎｂを２〜２５原子％、Ａｌを
４０〜５５原子％含有する金属間化合物基耐熱合金であ
る。The present invention is an alloy based on an intermetallic compound (Ti, Nb) Al phase, which comprises:
It is an intermetallic compound-based heat resistant alloy containing i of 25 to 60 atomic%, Nb of 2 to 25 atomic%, and Al of 40 to 55 atomic%.
【０００７】また、前記組成に、必要に応じＣｒ，Ｓ
ｉ，Ｎｉ，Ｚｒ，Ｙ，Ｖ，Ｍｎ，Ｔａ，Ｗ，Ｈｆ，Ｍｏ
よりなる群から選ばれた１つ以上の金属を単独あるいは
複合して０．１〜１０原子％含有させた金属間化合物基
耐熱合金である。In addition, if necessary, Cr, S may be added to the above composition.
i, Ni, Zr, Y, V, Mn, Ta, W, Hf, Mo
It is an intermetallic compound base heat resistant alloy containing 0.1 to 10 atom% of one or more metals selected from the group consisting of single or composite.
【０００８】[0008]
【作用】本発明の金属間化合物（Ｔｉ，Ｎｂ）Ａｌ基耐
熱合金は溶解法あるいは焼結法によって得られる。ま
た、溶解材、焼結材に対し恒温鍛造等の熱間加工を施す
ことにより組織を調整すれば特性は更に改善できる。The intermetallic compound (Ti, Nb) Al-based heat resistant alloy of the present invention can be obtained by a melting method or a sintering method. Further, the characteristics can be further improved by adjusting the structure by subjecting the molten material and the sintered material to hot working such as isothermal forging.
【０００９】本発明の金属間化合物（Ｔｉ，Ｎｂ）Ａｌ
基耐熱合金の組織は（Ｔｉ，Ｎｂ）Ａｌ相単相組織、あ
るいは（Ｔｉ，Ｎｂ）Ａｌ相を主相とする多相組織とな
る。この（Ｔｉ，Ｎｂ）Ａｌ相の結晶構造はＴｉＡｌ相
と同じＬ１0であり、ＴｉＡｌ相の結晶構造中における
Ｔｉサイトの一部にＮｂが置換した構造となる。The intermetallic compound (Ti, Nb) Al of the present invention
The structure of the base heat-resistant alloy is a (Ti, Nb) Al phase single phase structure or a multiphase structure having a (Ti, Nb) Al phase as a main phase. The crystal structure of this (Ti, Nb) Al phase is L1 0, which is the same as the TiAl phase, and is a structure in which a part of the Ti site in the crystal structure of the TiAl phase is replaced with Nb.
【００１０】金属間化合物（Ｔｉ，Ｎｂ）Ａｌ基耐熱合
金においては必要に応じ次の元素を添加してもよい。 ・ 常温延性を更に改善させる場合：Ｃｒ，Ｖ，Ｍｎ ・ 耐酸化性を更に改善させる場合：Ｃｒ，Ｓｉ，Ｎ
ｉ，Ｚｒ，Ｙ ・ 高温強度を更に改善させる場合：Ｔａ，Ｗ，Ｚｒ，
Ｈｆ，Ｍｏ 以下、本発明に係る合金元素の限定理由を説明する。If necessary, the following elements may be added to the intermetallic compound (Ti, Nb) Al-based heat resistant alloy.・ To improve room temperature ductility: Cr, V, Mn ・ To further improve oxidation resistance: Cr, Si, N
i, Zr, Y · To further improve high temperature strength: Ta, W, Zr,
Hf, Mo Hereinafter, the reasons for limiting the alloy elements according to the present invention will be described.
【００１１】〇 Ｔｉ：２５〜６０原子％ Ｔｉ濃度が２５原子％未満の場合、多相組織である本発
明合金中において、金属間化合物ＮｂＡｌ3 相の割合が
増加する。このＮｂＡｌ3 相は常温延性に乏しいため、
本発明合金の常温延性を低下させる要因となる。また、
Ｔｉ濃度が６０原子％を超える場合、金属間化合物Ｔｉ
3 Ａｌ相の割合が増加する。このＴｉ3 Ａｌ相は（Ｔ
ｉ，Ｎｂ）Ａｌ相に較べ高温強度、耐酸化性が劣るた
め、本発明合金の高温強度、耐酸化性を低下させる要因
となる。Ti: 25 to 60 atomic% When the Ti concentration is less than 25 atomic%, the proportion of the intermetallic compound NbAl 3 phase increases in the alloy of the present invention having a multiphase structure. Since this NbAl 3 phase has poor room temperature ductility,
It becomes a factor that lowers the room temperature ductility of the alloy of the present invention. Also,
When the Ti concentration exceeds 60 atomic%, the intermetallic compound Ti
3 The proportion of Al phase increases. This Ti 3 Al phase is (T
Since i, Nb) Al phase is inferior in high temperature strength and oxidation resistance as compared with Al phase, it becomes a factor of lowering high temperature strength and oxidation resistance of the alloy of the present invention.
【００１２】〇 Ｎｂ：２〜２５原子％ Ｎｂ濃度が２原子％未満の場合、（Ｔｉ，Ｎｂ）Ａｌ相
におけるＮｂの置換量は少なくなるため、ＴｉＡｌ相の
特性改善は不十分である。Ｎｂ濃度が２５原子％を超え
る場合、金属間化合物Ｎｂ2 Ａｌ相の割合が増加する。
このＮｂ2 Ａｌ相は常温延性に乏しいため、本発明合金
の常温延性を低下させる要因となる。Nb: 2 to 25 atomic% When the Nb concentration is less than 2 atomic%, the amount of Nb substituted in the (Ti, Nb) Al phase is small, so that the characteristic improvement of the TiAl phase is insufficient. When the Nb concentration exceeds 25 atomic%, the proportion of the intermetallic compound Nb 2 Al phase increases.
Since this Nb 2 Al phase is poor in room temperature ductility, it becomes a factor that lowers the room temperature ductility of the alloy of the present invention.
【００１３】〇 Ａｌ：４０〜５５原子％ Ａｌ濃度が４０原子％未満の場合、Ｔｉ3 Ａｌ相の割合
が増加し、５５原子％を超える場合、ＮｂＡｌ3 相の割
合が増加し、各々上述した理由で本発明合金の特性を低
下させる要因となる。Al: 40 to 55 atomic% When the Al concentration is less than 40 atomic%, the proportion of the Ti 3 Al phase increases, and when it exceeds 55 atomic%, the proportion of the NbAl 3 phase increases. For this reason, it becomes a factor that deteriorates the properties of the alloy of the present invention.
【００１４】〇 Ｃｒ，Ｓｉ，Ｎｉ，Ｚｒ，Ｙ，Ｖ，Ｍ
ｎ，Ｔａ，Ｗ，Ｈｆ，Ｍｏの単独及び複合添加量：０．
１〜１０原子％ 添加量が０．１原子％以下の場合、上述した本発明合金
の特性改善には不十分である。また、添加量が１０原子
％を超える場合、Ａｌと結合し低融点の金属間化合物相
を、あるいはＡｌ，Ｎｂと結合しラーベス相と云われる
非常に脆い３元系金属間化合物相を生成するため、各々
本発明合金の高温強度、常温延性を低下させる要因とな
る。〇Cr, Si, Ni, Zr, Y, V, M
n, Ta, W, Hf, Mo alone or in combination: 0.
1 to 10 atomic% When the added amount is 0.1 atomic% or less, it is not sufficient to improve the properties of the alloy of the present invention described above. When the amount added exceeds 10 atomic%, a low melting point intermetallic compound phase is formed by combining with Al, or an extremely brittle ternary intermetallic compound phase called a Laves phase is formed by combining with Al and Nb. Therefore, they are factors that reduce the high temperature strength and the room temperature ductility of the alloy of the present invention.
【００１５】[0015]
【実施例】純度９９．９９％のＴｉ、純度９９．９％の
Ｎｂ、純度９９．９９％のＡｌを原料とし、高周波溶解
により作製した４５原子％Ｔｉ−１０原子％Ｎｂ−４５
原子％Ａｌ合金から、ねじ部Ｍ１０、平行部５ｍｍ径×
２２ｍｍ長さの引張試験片及び２０ｍｍ角×２ｍｍ厚さ
の酸化試験片を切り出し、引張試験及び酸化試験を行っ
た。その結果は表１に示す通りであった。[Examples] 45 atomic% Ti-10 atomic% Nb-45 prepared by high frequency melting using Ti of 99.99% purity, Nb of 99.9% purity and Al of 99.99% purity as raw materials.
From atomic% Al alloy, screw part M10, parallel part 5mm diameter ×
A 22 mm long tensile test piece and a 20 mm square × 2 mm thick oxidation test piece were cut out and subjected to a tensile test and an oxidation test. The results are shown in Table 1.
【００１６】比較のため、同一条件で作製した５１．５
原子％Ｔｉ−４７原子％Ａｌ−１．５原子％Ｍｎ合金
（特公昭６２−２１５号公報）の引張試験及び酸化試験
を行った。その結果は表２に示す通りであった。For comparison, 51.5 manufactured under the same conditions
A tensile test and an oxidation test of an atomic% Ti-47 atomic% Al-1.5 atomic% Mn alloy (Japanese Patent Publication No. 62-215) were conducted. The results are shown in Table 2.
【００１７】前記の表１と表２に示す結果の比較から明
らかなように、本発明の合金は従来のＭｎ添加により常
温延性が改善されたＴｉＡｌと比較した場合、常温延性
はほぼ同等であるものの、高温強度及び耐酸化性は著し
く優れていることが分かる。As is clear from the comparison of the results shown in Tables 1 and 2, the alloy of the present invention has almost the same room temperature ductility when compared with TiAl whose conventional room temperature ductility is improved by the addition of Mn. However, it can be seen that the high temperature strength and the oxidation resistance are remarkably excellent.
【００１８】同様な条件で作製した４５原子％Ｔｉ−１
０原子％Ｎｂ−４０原子％Ａｌ−５原子％Ｃｒ合金の引
張試験及び酸化試験結果を表３に示す。表３と表１、表
２に示す結果の比較から明らかなように、Ｃｒ添加によ
り常温延性及び耐酸化性は更に改善することが分かる。45 atomic% Ti-1 produced under similar conditions
Table 3 shows the tensile test and oxidation test results of the 0 atomic% Nb-40 atomic% Al-5 atomic% Cr alloy. As is clear from the comparison of the results shown in Table 3, Table 1 and Table 2, it is understood that the addition of Cr further improves the room temperature ductility and the oxidation resistance.
【表１】 [Table 1]
【表２】 [Table 2]
【表３】 [Table 3]
【００１９】[0019]
【発明の効果】本発明の金属間化合物（Ｔｉ，Ｎｂ）Ａ
ｌ基耐熱合金の主相である（Ｔｉ，Ｎｂ）Ａｌ相は、結
晶構造Ｌ１0 のＴｉＡｌ相中のＴｉサイトの一部にＮｂ
が置換した構造をもつ。本発明合金はＴｉＡｌに較べる
と常温延性、高温強度及び耐酸化性のいずれも優れてい
る。また、Ｖ，Ｍｎ添加により常温延性が改善されたＴ
ｉＡｌ基耐熱合金と比較した場合においても、高温強
度、耐酸化性は優れている。EFFECT OF THE INVENTION Intermetallic compound (Ti, Nb) A of the present invention
is the main phase of l-base heat-resistant alloy (Ti, Nb) Al phase, Nb in a part of Ti site of TiAl phase of crystal structure L1 0
Has a substituted structure. Compared with TiAl, the alloy of the present invention is superior in room temperature ductility, high temperature strength and oxidation resistance. Also, the room temperature ductility is improved by adding V and Mn.
Even when compared with the iAl-based heat-resistant alloy, the high temperature strength and oxidation resistance are excellent.
【００２０】以上の理由から、本発明合金は従来のＴｉ
Ａｌ基耐熱合金に較べ、さらに高温用途に使用すること
ができる。For the above reasons, the alloy of the present invention has a conventional Ti content.
It can be used for higher temperature applications than Al-based heat resistant alloys.
Claims (2)
スとした合金であって、Ｔｉを２５〜６０原子％、Ｎｂ
を２〜２５原子％、Ａｌを４０〜５５原子％含有する金
属間化合物基耐熱合金。1. An alloy based on an intermetallic compound (Ti, Nb) Al, comprising 25 to 60 atomic% of Ti and Nb.
2 to 25 atomic% and Al 40 to 55 atomic%.
ｉ，Ｎｉ，Ｚｒ，Ｙ，Ｖ，Ｍｎ，Ｔａ，Ｗ，Ｈｆ，Ｍｏ
よりなる群から選ばれた１つ以上の金属を単独あるいは
複合して０．１〜１０原子％含有させた金属間化合物基
耐熱合金。2. The composition of claim 1, if necessary, Cr, S
i, Ni, Zr, Y, V, Mn, Ta, W, Hf, Mo
An intermetallic compound-based heat-resistant alloy containing 0.1 to 10 atomic% of one or more metals selected from the group consisting of the following:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24542991A JP3310680B2 (en) | 1991-09-25 | 1991-09-25 | Intermetallic compound-based heat-resistant alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24542991A JP3310680B2 (en) | 1991-09-25 | 1991-09-25 | Intermetallic compound-based heat-resistant alloy |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0578769A true JPH0578769A (en) | 1993-03-30 |
| JP3310680B2 JP3310680B2 (en) | 2002-08-05 |
Family
ID=17133529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24542991A Expired - Lifetime JP3310680B2 (en) | 1991-09-25 | 1991-09-25 | Intermetallic compound-based heat-resistant alloy |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3310680B2 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996012827A1 (en) * | 1994-10-25 | 1996-05-02 | Mitsubishi Jukogyo Kabushiki Kaisha | TiAl INTERMETALLIC COMPOUND ALLOY AND PROCESS FOR PRODUCING THE ALLOY |
| EP0889143A1 (en) * | 1997-07-05 | 1999-01-07 | ROLLS-ROYCE plc | Titanium aluminide alloys |
| DE102004056582A1 (en) * | 2004-11-23 | 2006-06-01 | Gkss-Forschungszentrum Geesthacht Gmbh | Alloy based on titanium aluminides |
| JP2009144247A (en) * | 2007-12-13 | 2009-07-02 | Gkss-Forschungszentrum Geesthacht Gmbh | Titanium aluminide alloy and working method thereof, and structural parts produced using the titanium aluminide alloy |
| CN102181748A (en) * | 2011-05-26 | 2011-09-14 | 洛阳双瑞精铸钛业有限公司 | Titanium-aluminum base alloy with excellent room temperature ductility and casting fluidity and preparation method of titanium-aluminum base alloy |
| CN103572102A (en) * | 2013-11-05 | 2014-02-12 | 姚芸 | High-temperature heat-resistant aluminum alloy |
| CN103710606A (en) * | 2013-12-16 | 2014-04-09 | 北京工业大学 | Novel beta-gamma TiAl intermetallic compound material containing Cr and high Nb content and preparation method of material |
| WO2014115921A1 (en) * | 2013-01-23 | 2014-07-31 | 한국기계연구원 | Titanium-aluminum alloy having enhanced high temperature strength and oxidation resistance |
| RU2621500C1 (en) * | 2015-12-21 | 2017-06-06 | Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский технологический университет "МИСиС" | INTERMETALLIC TiAl BASED ALLOY |
| RU2633135C1 (en) * | 2016-11-11 | 2017-10-11 | Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский технологический университет "МИСиС" | Intermetallic tial-based alloy |
| WO2020086263A1 (en) * | 2018-10-22 | 2020-04-30 | Arconic Inc. | New titanium aluminide alloys and methods for making the same |
-
1991
- 1991-09-25 JP JP24542991A patent/JP3310680B2/en not_active Expired - Lifetime
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996012827A1 (en) * | 1994-10-25 | 1996-05-02 | Mitsubishi Jukogyo Kabushiki Kaisha | TiAl INTERMETALLIC COMPOUND ALLOY AND PROCESS FOR PRODUCING THE ALLOY |
| US6051084A (en) * | 1994-10-25 | 2000-04-18 | Mitsubishi Jukogyo Kabushiki Kaisha | TiAl intermetallic compound-based alloys and methods for preparing same |
| EP0889143A1 (en) * | 1997-07-05 | 1999-01-07 | ROLLS-ROYCE plc | Titanium aluminide alloys |
| US5997808A (en) * | 1997-07-05 | 1999-12-07 | Rolls-Royce Plc | Titanium aluminide alloys |
| DE102004056582A1 (en) * | 2004-11-23 | 2006-06-01 | Gkss-Forschungszentrum Geesthacht Gmbh | Alloy based on titanium aluminides |
| DE102004056582B4 (en) * | 2004-11-23 | 2008-06-26 | Gkss-Forschungszentrum Geesthacht Gmbh | Alloy based on titanium aluminides |
| EP2145967A3 (en) * | 2007-12-13 | 2010-04-21 | Gkss-Forschungszentrum Geesthacht Gmbh | Titanium aluminide alloys |
| EP2075349A3 (en) * | 2007-12-13 | 2009-09-09 | Gkss-Forschungszentrum Geesthacht Gmbh | Titanium aluminide alloys |
| JP2009144247A (en) * | 2007-12-13 | 2009-07-02 | Gkss-Forschungszentrum Geesthacht Gmbh | Titanium aluminide alloy and working method thereof, and structural parts produced using the titanium aluminide alloy |
| EP2423341A1 (en) * | 2007-12-13 | 2012-02-29 | Helmholtz-Zentrum Geesthacht Zentrum für Material- und Küstenforschung GmbH | Titanium aluminide alloys |
| CN102181748A (en) * | 2011-05-26 | 2011-09-14 | 洛阳双瑞精铸钛业有限公司 | Titanium-aluminum base alloy with excellent room temperature ductility and casting fluidity and preparation method of titanium-aluminum base alloy |
| WO2014115921A1 (en) * | 2013-01-23 | 2014-07-31 | 한국기계연구원 | Titanium-aluminum alloy having enhanced high temperature strength and oxidation resistance |
| CN103572102A (en) * | 2013-11-05 | 2014-02-12 | 姚芸 | High-temperature heat-resistant aluminum alloy |
| CN103710606A (en) * | 2013-12-16 | 2014-04-09 | 北京工业大学 | Novel beta-gamma TiAl intermetallic compound material containing Cr and high Nb content and preparation method of material |
| CN103710606B (en) * | 2013-12-16 | 2016-07-06 | 北京工业大学 | A kind of containing Cr height Nb β-γ TiAl intermetallic compound material and preparation method thereof |
| RU2621500C1 (en) * | 2015-12-21 | 2017-06-06 | Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский технологический университет "МИСиС" | INTERMETALLIC TiAl BASED ALLOY |
| RU2633135C1 (en) * | 2016-11-11 | 2017-10-11 | Федеральное государственное автономное образовательное учреждение высшего образования "Национальный исследовательский технологический университет "МИСиС" | Intermetallic tial-based alloy |
| WO2020086263A1 (en) * | 2018-10-22 | 2020-04-30 | Arconic Inc. | New titanium aluminide alloys and methods for making the same |
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